| 三电平逆变器中点电位控制算法研究 |
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| 引用本文： | 刘玲玲,王卫安,陈艺峰.三电平逆变器中点电位控制算法研究[J].变流技术与电力牵引,2014(3):26-31. |
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| 作者姓名： | 刘玲玲 王卫安 陈艺峰 |
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| 作者单位： | 湖南工业大学电气与信息工程学院;南车株洲电力机车研究所有限公司; |
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| 摘 要： | 介绍了中点箝位型三电平逆变器的工作原理，根据其特有的拓扑结构分析了PWM调制方法，针对直流侧电容中点电位漂移的问题，提出了每相调制波叠加零序电压分量的控制策略。最后对该控制策略进行Matlab仿真，仿真结果验证了控制策略的正确性和可行性。
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| 关 键 词： | 三电平逆变器 PWM调制 中点电位漂移 零序电压 |
Research on Neutral Point Potential Control Arithmetic for Three-level Invertor |
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| Institution: | LIU Ling-ling, WANG Wei-an, CHEN Yi-feng(1.College of Electrical and Information Engineering, Hunan Univercity of Technology, Zhuzhou, Hunan 412007,China; 2.CSR Zhuzhou Institute Co.,Ltd., Zhuzhou, Hunan 412001, China) |
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| Abstract: | It introduced the theory of neutral-point-clamped （NPC） three-level inverter and its PWM method. It analyzed why DC-side capacitors＇ voltage fluctuated and proposed the strategy of adding zero-sequence component to every phase modulation wave for preventing neutral point potential shifting. Matlab simulation was carded out for the control strategy. The results show that the control strategy is correct. |
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| Keywords: | three-level invertor PWM modulation neutral point potential shifting zero-sequence voltage |
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